<template>
  <div>
    <draggable @end="end" v-model="dataArr" item-key="id" style="display: flex">
      <template #item="{ element }">
        <div class="imgDiv">
          <img :src="element.filePath" preview="index" />
        </div>
      </template>
      <template #footer>
        <a-button @click="sureChange" type="primary" style="margin-top: 100px">确定</a-button>
      </template>
    </draggable>
    <a-divider>json数据</a-divider>
    <a-row>
      <a-col :span="12">
        <p>拖拽前：</p>
        <textarea rows="25" style="width: 780px">{{ oldDateSource }}</textarea>
      </a-col>
      <a-col :span="12">
        <p>拖拽后：</p>
        <textarea rows="25" style="width: 780px">{{ newDateSource }}</textarea>
      </a-col>
    </a-row>
  </div>
</template>

<script lang="ts" setup>
import draggable from 'vuedraggable';
import { defineComponent, ref, unref } from 'vue';

const mockData = [
  { id: '000', sort: 0, filePath: 'https://static.jeecg.com/upload/test/1_1588149743473.jpg' },
  { id: '111', sort: 1, filePath: 'https://static.jeecg.com/upload/test/u27356337152749454924fm27gp0_1588149731821.jpg' },
  { id: '222', sort: 2, filePath: 'https://static.jeecg.com/upload/test/u24454681402491956848fm27gp0_1588149712663.jpg' },
  { id: '333', sort: 3, filePath: 'https://img2.baidu.com/it/u=3406119999,3272762192&fm=253&fmt=auto&app=138&f=JPEG?w=500&h=500' },
  { id: '444', sort: 4, filePath: 'https://static.jeecg.com/upload/test/u8891206113801177793fm27gp0_1588149704459.jpg' },
];

//数据集
const dataArr = ref(mockData);
//原始数据
const oldDateSource = ref(mockData);
//更改后的数据
const newDateSource = ref([]);

/**
 * 拖动结束事件
 * @param evt
 */
function end(evt) {
  console.log('拖动前的位置' + evt.oldIndex);
  console.log('拖动后的位置' + evt.newIndex);
}

/**
 * 确认更改事件
 * @param evt
 */
function sureChange() {
  for (let i = 0; i < unref(dataArr).length; i++) {
    dataArr.value[i].sort = i;
  }
  newDateSource.value = unref(dataArr);
}
</script>

<style scoped lang="less">
.imgDiv {
  padding: 8px;
  border: 1px solid #d9d9d9;
  border-radius: 4px;
  margin: 0 8px 8px 0;

  img {
    width: 120px;
    height: 120px;
    object-fit: cover;
  }
}
</style>
